Estimation of the shear zone size in FCC _ single crystals based on the model of dislocation interactions

International Scientific Conference of Young Scientists: Advanced Materials in Construction and Engineering

材料科学;土木建筑工程;工业技术

Starenchenko, V.A.^1 ; Kurinnaya, R.I.^1 ; Cherepanov, D.N.^1 ; Zgolich, M.V.^1 ; Selivanikova, O.V.^2

Tomsk State University of Architecture and Building, Department of Higher Mathematics, Tomsk

634003, Russia^1

National Research Tomsk Polytechnic University, Department of Physical and Power Plants, Tomsk

634050, Russia^2

关键词: Dislocation interaction;    Dislocation loop;    Dislocation sources;    Fcc Single crystals;    Non-coplanar slip systems;    Shear zone;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/71/1/012080/pdf
DOI  :  10.1088/1757-899X/71/1/012080

来源: IOP

【 摘 要 】

The main objective of the mathematical modeling of a shear plastic strain is estimation of the shear zone size. The paper is devoted to refinement of estimations of the shear zone size based on the model of dislocation interactions proposed by the authors. It is assumed that shear-forming dislocation loops, emitted by the dislocation source, are stopped by strong dislocation barriers that arise from the interaction of segments of expanding dislocation loops with reacting dislocations of non-coplanar slip systems. The formed barriers hinder further expansion of dislocation loops and, as a result, form the boundary of the shear zone. A refined estimation of the shear zone size has been obtained.